1 /**
2  * Copyright 2019 Google Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *     http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include "sensors/buildjson.hpp"
18 
19 #include "conf.hpp"
20 #include "sensors/sensor.hpp"
21 
22 #include <nlohmann/json.hpp>
23 
24 using json = nlohmann::json;
25 
26 namespace conf
27 {
28 void from_json(const json& j, conf::SensorConfig& s)
29 {
30     j.at("type").get_to(s.type);
31     j.at("readPath").get_to(s.readPath);
32 
33     /* The writePath field is optional in a configuration */
34     auto writePath = j.find("writePath");
35     if (writePath == j.end())
36     {
37         s.writePath = "";
38     }
39     else
40     {
41         j.at("writePath").get_to(s.writePath);
42     }
43 
44     /* The min field is optional in a configuration. */
45     auto min = j.find("min");
46     if (min == j.end())
47     {
48         s.min = 0;
49     }
50     else
51     {
52         j.at("min").get_to(s.min);
53     }
54 
55     /* The max field is optional in a configuration. */
56     auto max = j.find("max");
57     if (max == j.end())
58     {
59         s.max = 0;
60     }
61     else
62     {
63         j.at("max").get_to(s.max);
64     }
65 
66     /* The timeout field is optional in a configuration. */
67     auto timeout = j.find("timeout");
68     if (timeout == j.end())
69     {
70         s.timeout = Sensor::getDefaultTimeout(s.type);
71     }
72     else
73     {
74         j.at("timeout").get_to(s.timeout);
75     }
76 }
77 } // namespace conf
78 
79 std::map<std::string, struct conf::SensorConfig>
80     buildSensorsFromJson(const json& data)
81 {
82     std::map<std::string, struct conf::SensorConfig> config;
83     auto sensors = data["sensors"];
84 
85     /* TODO: If no sensors, this is invalid, and we should except here or during
86      * parsing.
87      */
88     for (const auto& sensor : sensors)
89     {
90         config[sensor["name"]] = sensor.get<struct conf::SensorConfig>();
91     }
92 
93     return config;
94 }
95